Add the ability to set DNS API configuration at domain level

ACME-DNS provide credentials for each domain. Each credential is allowed to
update only its subdomain record.

dns_scripts/dns_add_acmedns

@@ -1,4 +1,9 @@
 #!/usr/bin/env bash
+
+# ACMEDNS env variables can be set in a config file at domain level
+acme_config="$DOMAIN_DIR/acme-dns.cfg"
+[ -s "$acme_config" ] && . "$acme_config"
+
 # Need to add your API user and key below or set as env variable
 apiuser=${ACMEDNS_API_USER:-''}
 apikey=${ACMEDNS_API_KEY:-''}

getssl

@@ -2980,7 +2980,7 @@ fi
 # Define defaults for variables not set in the main config.
 ACCOUNT_KEY="${ACCOUNT_KEY:=$WORKING_DIR/account.key}"
 DOMAIN_STORAGE="${DOMAIN_STORAGE:=$WORKING_DIR}"
-DOMAIN_DIR="$DOMAIN_STORAGE/$DOMAIN"
+export DOMAIN_DIR="$DOMAIN_STORAGE/$DOMAIN"
 CERT_FILE="$DOMAIN_DIR/${DOMAIN}.crt"
 FULL_CHAIN="$DOMAIN_DIR/fullchain.crt"
 CA_CERT="$DOMAIN_DIR/chain.crt"